JPH08226016A - Polylactic acid fiber and its production - Google Patents
Polylactic acid fiber and its productionInfo
- Publication number
- JPH08226016A JPH08226016A JP7030930A JP3093095A JPH08226016A JP H08226016 A JPH08226016 A JP H08226016A JP 7030930 A JP7030930 A JP 7030930A JP 3093095 A JP3093095 A JP 3093095A JP H08226016 A JPH08226016 A JP H08226016A
- Authority
- JP
- Japan
- Prior art keywords
- polylactic acid
- fiber
- breaking strength
- breaking
- elongation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Materials For Medical Uses (AREA)
- Biological Depolymerization Polymers (AREA)
- Artificial Filaments (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ポリ乳酸からなる加水
分解性の繊維及びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydrolyzable fiber made of polylactic acid and a method for producing the same.
【０００２】[0002]
【従来の技術】ポリ乳酸は、生体内での加水分解性を有
することから、従来、その強度と加水分解性を利用して
生体吸収性の縫合糸等に用いられてきた。例えば、特公
昭４１−２７３４号公報、特公昭４５−３１６９６号公
報には外科用の吸収性の縫合糸（フィラメント）の技術
が開示されている。2. Description of the Related Art Polylactic acid has been hydrolyzable in vivo, and has been conventionally used for bioabsorbable sutures and the like by utilizing its strength and hydrolyzability. For example, Japanese Patent Publication No. 41-2734 and Japanese Patent Publication No. 45-31696 disclose the technique of an absorbable suture (filament) for surgery.
【０００３】また、ポリ乳酸を溶媒に溶解して乾式紡
糸、延伸することにより８ｇ／ｄ以上の破断強度を有す
るポリ乳酸繊維が得られることが知られている。さら
に、近年ではポリ乳酸の加水分解性を利用した分解性の
釣り糸への応用が特開平３−１８３４２８号公報及び特
開平４−１０８３３１号公報等に提案されている。It is also known that polylactic acid fibers having a breaking strength of 8 g / d or more can be obtained by dissolving polylactic acid in a solvent, dry spinning and stretching. Further, in recent years, application to degradable fishing line utilizing the hydrolyzability of polylactic acid has been proposed in JP-A-3-183428 and JP-A-4-108331.
【０００４】これらの従来技術においては、乾式紡糸及
び延伸法で得られる、破断強度が８ｇ／ｄ以上の高強力
ポリ乳酸繊維では、破断伸度が１０〜２０％程度と低い
ものが多く、破断伸度は３０％未満であった。また、溶
融紡糸及び延伸法で得られる繊維では破断伸度が高いも
のが多いが、破断伸度が３０％以上のものでは破断強度
が低く、８ｇ／ｄ以上のものはこれまでなかった。In these prior arts, many of the high-strength polylactic acid fibers having a breaking strength of 8 g / d or more obtained by dry spinning and drawing methods have a breaking elongation as low as about 10 to 20%, and the breaking strength is low. The elongation was less than 30%. Many of the fibers obtained by the melt spinning and drawing methods have a high breaking elongation, but those having a breaking elongation of 30% or more have a low breaking strength, and none of them have a breaking elongation of 8 g / d or more.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、破断
強度が８ｇ／ｄ以上及び破断伸度が３０％以上の強度と
伸度の両方の物性を具備したポリ乳酸繊維及びその製造
方法を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a polylactic acid fiber having both physical properties of strength and elongation with a breaking strength of 8 g / d or more and a breaking elongation of 30% or more, and a method for producing the same. To provide.
【０００６】[0006]
【課題を解決するための手段】本発明は、ポリ乳酸から
なる繊維であって、破断強度が８ｇ／ｄ以上、破断伸度
が３０％以上であることを特徴とするポリ乳酸繊維の発
明であり、また、少なくとも次の（１）重量平均分子量
が１０万〜５０万のポリ乳酸を溶融紡糸し、未延伸繊維
とする工程、及び（２）紡糸された未延伸繊維を延伸倍
率４〜１０倍に熱延伸する工程を含む、破断強度が８ｇ
／ｄ以上、破断伸度が３０％以上であるポリ乳酸繊維の
製造方法の発明にある。DISCLOSURE OF THE INVENTION The present invention is an invention of a polylactic acid fiber characterized by having a breaking strength of 8 g / d or more and a breaking elongation of 30% or more. In addition, at least the following step (1) of melt-spinning polylactic acid having a weight average molecular weight of 100,000 to 500,000 to obtain unstretched fibers, and (2) spinning the unstretched fibers at a draw ratio of 4 to 10 Breaking strength is 8g, including double heat drawing
/ D or more, and the elongation at break is 30% or more.
【０００７】本発明で用いられるポリ乳酸は、ポリＬ−
乳酸、ポリＤ−乳酸、ポリＤ、Ｌ−乳酸またはこれらの
混合物を用いることができる。これらのポリ乳酸の中
で、光学活性なエナンチオマーであるＬ−乳酸またはＤ
−乳酸の単位を９０モル％以上含有するものは、ＤＳＣ
等の測定により明瞭な融点を有する結晶性重合体である
ため好ましく用いられる。The polylactic acid used in the present invention is poly L-
Lactic acid, poly D-lactic acid, poly D, L-lactic acid or a mixture thereof can be used. Among these polylactic acids, L-lactic acid or D which is an optically active enantiomer
-DSC containing 90 mol% or more of lactic acid units is DSC
It is preferably used because it is a crystalline polymer having a clear melting point according to measurement such as.
【０００８】本発明で用いられるポリ乳酸は、従来公知
の方法により、乳酸を重合して製造することができる。
重合法の例としては、例えば、乳酸を直接脱水縮合して
ポリ乳酸とする方法、乳酸の環状二量体であるラクチド
を開環重合してポリ乳酸とする方法等が挙げられる。ま
た、これらの重合反応を溶媒中で行ってもよく、必要な
場合には触媒や開始剤を用いて反応を効率よく行っても
よい。これらの方法は、必要な分子量等を考慮して適宜
選択すればよい。The polylactic acid used in the present invention can be produced by polymerizing lactic acid by a conventionally known method.
Examples of the polymerization method include a method of directly dehydrating and condensing lactic acid to form polylactic acid, a method of ring-opening polymerization of lactide which is a cyclic dimer of lactic acid to form polylactic acid, and the like. Further, these polymerization reactions may be carried out in a solvent, and if necessary, the reaction may be carried out efficiently by using a catalyst or an initiator. These methods may be appropriately selected in consideration of the required molecular weight and the like.
【０００９】また、ポリ乳酸繊維としての性能を損なわ
ない範囲でヒドロキシカルボン酸類、ラクトン類等のコ
モノマ−との共重合体を用いてもよい。共重合可能なヒ
ドロキシカルボン酸類、ラクトン類としては、グリコ−
ル酸、３−ヒドロキシキ酪酸、４−ヒドロキシ酪酸、４
−ヒドロキシ吉草酸、ヒドロキシカプロン酸、グリコリ
ド、β−プロピオラクトン、β−メチル−δ−バレロラ
クトン、β−ブチロラクトン、γ−ブチロラクトン、ε
−カプロラクトン、δ−バレロラクトン等が挙げられ
る。Further, copolymers with comonomers such as hydroxycarboxylic acids and lactones may be used as long as the performance as the polylactic acid fiber is not impaired. Copolymerizable hydroxycarboxylic acids and lactones include glyco-
Acid, 3-hydroxychibutyric acid, 4-hydroxybutyric acid, 4
-Hydroxyvaleric acid, hydroxycaproic acid, glycolide, β-propiolactone, β-methyl-δ-valerolactone, β-butyrolactone, γ-butyrolactone, ε
-Caprolactone, delta-valerolactone and the like can be mentioned.
【００１０】本発明のポリ乳酸繊維は、破断強度が８ｇ
／ｄ以上及び破断伸度が３０％以上であり、特定以上の
強度と伸度を具備した繊維である。また、繊維の形状、
サイズ等は特に限定されない。フィラメント、ステ−プ
ルのいずれでもよく、フィラメントはモノフイラメン
ト、マルチフィラメントのいずれでもよい。繊維の断面
の形状は特に限定されず、必要に応じて適宜選択すれば
よい。また、本発明のポリ乳酸繊維は、様々に加工して
用いることができ、例えば、釣り糸、ロ−プ、不織布、
網等に加工して用いることができる。The polylactic acid fiber of the present invention has a breaking strength of 8 g.
/ D or more and the elongation at break of 30% or more, and the fiber has the strength and the elongation of a certain level or more. Also, the shape of the fiber,
The size and the like are not particularly limited. Either filament or staple may be used, and the filament may be either monofilament or multifilament. The shape of the cross section of the fiber is not particularly limited and may be appropriately selected as needed. Further, the polylactic acid fiber of the present invention can be used after being processed in various ways, for example, fishing line, rope, nonwoven fabric,
It can be used after being processed into a net or the like.
【００１１】次に、本発明のポリ乳酸繊維の製造方法に
ついて説明する。Next, the method for producing the polylactic acid fiber of the present invention will be described.
【００１２】本発明で用いるポリ乳酸の分子量は、重量
平均分子量が１０万〜５０万の範囲であることが好まし
い。重量平均分子量が５０万を超える場合には溶融紡糸
により繊維を製造する場合に、紡糸温度がポリ乳酸の分
解温度よりも高くなるために、分子量の低下が激しくな
り、繊維の強度が低下する傾向となるため好ましくな
い。また、重量平均分子量が１０万より低いものでは、
繊維を製造しても破断強度が低いものとなる傾向となる
ため好ましくない。The polylactic acid used in the present invention preferably has a weight average molecular weight of 100,000 to 500,000. When the weight average molecular weight exceeds 500,000, when the fiber is produced by melt spinning, the spinning temperature becomes higher than the decomposition temperature of polylactic acid, so that the decrease in the molecular weight becomes severe and the strength of the fiber tends to decrease. Is not preferable. If the weight average molecular weight is lower than 100,000,
Even if a fiber is manufactured, the breaking strength tends to be low, which is not preferable.
【００１３】本発明のポリ乳酸繊維の製造方法は、好ま
しくは１０万〜５０万の重量平均分子量を有するポリ乳
酸を溶融紡糸し、未延伸繊維とする工程と紡糸された未
延伸繊維を延伸倍率４〜１０倍に熱延伸する工程を少な
くとも含む。The method for producing the polylactic acid fiber of the present invention is preferably a step of melt-spinning polylactic acid having a weight average molecular weight of 100,000 to 500,000 to obtain an unstretched fiber and a stretching ratio of the spun unstretched fiber. It includes at least a step of hot stretching 4 to 10 times.
【００１４】溶融紡糸の方法は公知の方法を用いればよ
く、特に限定されない。紡糸温度は、ポリ乳酸の融点以
上で、ポリ乳酸の分子量に応じて適宜決めればよいが、
ポリ乳酸の分解による分子量低下を防ぐためには、なる
べく低い温度であることがよく、２２０℃以下であるこ
とが好ましい。The melt spinning method may be a known method and is not particularly limited. The spinning temperature is not lower than the melting point of polylactic acid and may be appropriately determined according to the molecular weight of polylactic acid.
In order to prevent a decrease in the molecular weight due to the decomposition of polylactic acid, the temperature should be as low as possible, preferably 220 ° C or lower.
【００１５】紡糸の工程では、通常、ノズルからポリ乳
酸を押し出して紡糸するが、ノズルの形状、糸の断面の
形状、サイズ等は特に限定されない。また、中空繊維用
のノズルを用いて中空繊維としてもよい。紡糸時のドラ
フト（＝紡糸速度／吐出線速度）は、未延伸繊維の結晶
性、配向度の向上と糸切れの現象を考慮すると５０〜２
００の範囲であることが好ましい。In the spinning step, polylactic acid is usually extruded from a nozzle for spinning, but the shape of the nozzle, the cross-sectional shape of the yarn, the size, etc. are not particularly limited. Alternatively, a hollow fiber nozzle may be used to form a hollow fiber. The draft (= spinning speed / ejection linear velocity) during spinning is 50 to 2 in consideration of the crystallinity of the unstretched fiber, the improvement of the degree of orientation and the phenomenon of yarn breakage.
It is preferably in the range of 00.
【００１６】このようにして紡糸の工程で得られたポリ
乳酸未延伸繊維は、必要に応じて結晶性を上げるために
熱処理を行って、次の延伸の工程に進める。The polylactic acid unstretched fiber thus obtained in the spinning step is subjected to a heat treatment as necessary to improve the crystallinity, and then proceeded to the next stretching step.
【００１７】本発明では、次に前述のようにして得られ
たポリ乳酸未延伸繊維を４〜１０倍に延伸する。延伸倍
率が４倍より低い場合には繊維の配向が充分でなく、目
的とする破断強度が得られない。また、延伸倍率が１０
倍を超えると破断強度は充分であるが、目的とする破断
伸度が得られない。In the present invention, the polylactic acid unstretched fiber obtained as described above is then stretched 4 to 10 times. If the draw ratio is lower than 4 times, the orientation of the fibers is insufficient and the desired breaking strength cannot be obtained. Also, the draw ratio is 10
If it exceeds twice, the breaking strength is sufficient, but the desired breaking elongation cannot be obtained.
【００１８】延伸方法は、公知の任意の方法を用いれば
よく、特に限定されない。例えば、一段で４〜１０倍に
延伸してもよく、多段方式で総延伸倍率が４〜１０倍と
なるように延伸してもよい。多段延伸方式で延伸する場
合は、段ごとに延伸温度、変形速度、延伸倍率を変えて
延伸してもよい。The stretching method may be any known method and is not particularly limited. For example, it may be stretched in one stage to 4 to 10 times, or may be stretched in a multi-stage manner so that the total stretching ratio is 4 to 10 times. When the multi-stage stretching method is used, the stretching temperature, the deformation speed, and the stretching ratio may be changed for each stage.
【００１９】延伸温度は、ポリ乳酸のＴｇ（ガラス転移
点）以上、融点以下であることが好ましく、最大延伸倍
率との関係から１００℃〜１４０℃の温度範囲であるこ
とが特に好ましい。また、延伸後に延伸温度より高い温
度で熱処理を行ってもよい。熱処理は定長で行ってもよ
く、また１０％以下程度の緩和でもって行ってもよい。
以上に述べた工程はそれぞれバッチ方式で行ってもよ
く、また工程を連続的に行ってもよい。The stretching temperature is preferably not lower than the Tg (glass transition point) of polylactic acid and not higher than the melting point, and particularly preferably in the temperature range of 100 ° C. to 140 ° C. in view of the maximum stretching ratio. Further, the heat treatment may be performed after the stretching at a temperature higher than the stretching temperature. The heat treatment may be performed with a fixed length or with relaxation of about 10% or less.
The steps described above may be carried out in a batch system, or the steps may be carried out continuously.
【００２０】[0020]
【実施例】以下、本発明を実施例により具体的に説明す
る。EXAMPLES The present invention will be specifically described below with reference to examples.
【００２１】実施例中の物性値等は以下の方法により測
定して求めたものである。The physical property values and the like in the examples are measured and obtained by the following methods.
【００２２】重量平均分子量：溶媒としてＴＨＦを用い
てＧＰＣで測定した。Weight average molecular weight: measured by GPC using THF as a solvent.
【００２３】引張強度試験：通常の引張試験機を用い
て、試料長２ｃｍのフィラメントを２０ｍｍ／分で引張
り、破断強度と破断伸度を測定した。Tensile strength test: Using a normal tensile tester, a filament having a sample length of 2 cm was pulled at 20 mm / min to measure the breaking strength and the breaking elongation.
【００２４】（実施例１）重量平均分子量が２２４，０
００のポリＬ−乳酸を１９０℃で紡糸ドラフト１００で
溶融紡糸し、未延伸繊維（I）（モノフィラメント）を
得た。この未延伸繊維（I）の破断強度及び破断伸度を
測定したところ、それぞれ２．４ｇ／ｄ、６６％であっ
た。Example 1 The weight average molecular weight is 224,0.
Poly L-lactic acid of No. 00 was melt-spun at 190 ° C. in a spinning draft 100 to obtain an unstretched fiber (I) (monofilament). When the breaking strength and breaking elongation of this unstretched fiber (I) were measured, they were 2.4 g / d and 66%, respectively.
【００２５】次に、未延伸繊維（I）を１２０℃で５倍
に延伸し、次いで１２５℃で定長で熱処理した。得られ
たポリ乳酸繊維（I）の物性を測定したところ、繊度
７．２デニール（ｄ）、破断強度８．４ｇ／ｄ、破断伸
度３３％であった。Next, the unstretched fiber (I) was stretched 5 times at 120 ° C. and then heat-treated at 125 ° C. in a fixed length. When the physical properties of the obtained polylactic acid fiber (I) were measured, the fineness was 7.2 denier (d), the breaking strength was 8.4 g / d, and the breaking elongation was 33%.
【００２６】（実施例２）実施例１で得た未延伸繊維
（I）を１１０℃で８倍に延伸し、次いで１１５℃で定
長で熱処理した。得られたポリ乳酸繊維（II）の物性を
測定したところ、繊度４．５ｄ、破断強度９．２ｇ／
ｄ、破断伸度３１％であった。Example 2 The unstretched fiber (I) obtained in Example 1 was stretched 8 times at 110 ° C. and then heat-treated at 115 ° C. for a fixed length. When the physical properties of the obtained polylactic acid fiber (II) were measured, the fineness was 4.5d, the breaking strength was 9.2g /
d, the elongation at break was 31%.
【００２７】（実施例３）重量平均分子量が４５２，０
００のポリＬ−乳酸を２１０℃で紡糸ドラフト１５０で
溶融紡糸し、未延伸繊維（II）（モノフィラメント）を
得た。この未延伸繊維（II）の破断強度及び破断伸度を
測定したところ、それぞれ１．９ｇ／ｄ、６３％であっ
た。(Example 3) Weight average molecular weight of 452,0
Poly L-lactic acid of No. 00 was melt-spun at 210 ° C. in a spinning draft 150 to obtain an unstretched fiber (II) (monofilament). When the breaking strength and breaking elongation of this unstretched fiber (II) were measured, they were 1.9 g / d and 63%, respectively.
【００２８】次に、未延伸繊維（II）を１１０℃で４時
間熱処理した後、１３０℃で４倍に延伸し、次いで１３
５℃で定長で熱処理した。得られたポリ乳酸繊維（II
I）の物性を測定したところ、繊度４．１ｄ、破断強度
８．１ｇ／ｄ、破断伸度３５％であった。Next, the unstretched fiber (II) was heat treated at 110 ° C. for 4 hours, then stretched 4 times at 130 ° C., and then 13
Heat treatment was performed at a constant length at 5 ° C. Obtained polylactic acid fiber (II
When the physical properties of I) were measured, the fineness was 4.1 d, the breaking strength was 8.1 g / d, and the breaking elongation was 35%.
【００２９】（実施例４）実施例１で用いたポリＬ−乳
酸を１９０℃で紡糸ドラフト８０で溶融紡糸し、未延伸
繊維（III）（モノフィラメント）を得た。この未延伸
繊維（III）の破断強度及び破断伸度を測定したとこ
ろ、それぞれ１．８ｇ／ｄ、６９％であった。Example 4 The poly-L-lactic acid used in Example 1 was melt-spun at 190 ° C. in a spinning draft 80 to obtain an unstretched fiber (III) (monofilament). When the breaking strength and breaking elongation of this unstretched fiber (III) were measured, they were 1.8 g / d and 69%, respectively.
【００３０】次に、未延伸繊維（III）を１２０℃で７
倍に延伸し、１２５℃で５％の緩和熱処理を行った。得
られたポリ乳酸繊維（ＩＶ）の物性を測定したところ、
繊度６．０ｄ、破断強度８．７ｇ／ｄ、破断伸度３２％
であった。Next, the unstretched fiber (III) was heated at 120 ° C. for 7 hours.
It was stretched twice and subjected to 5% relaxation heat treatment at 125 ° C. When the physical properties of the obtained polylactic acid fiber (IV) were measured,
Fineness 6.0d, breaking strength 8.7g / d, breaking elongation 32%
Met.
【００３１】（実施例５）重量平均分子量が３２８，０
００のポリＤ−乳酸を２００℃で紡糸ドラフト１００で
溶融紡糸し、未延伸繊維（ＩＶ）（モノフィラメント）
を得た。この未延伸繊維（ＩＶ）の破断強度及び破断伸
度を測定したところ、それぞれ２．５ｇ／ｄ、６２％で
あった。Example 5 The weight average molecular weight is 328,0.
Poly-D-lactic acid of No. 00 was melt-spun at 200 ° C. in a spinning draft 100 to obtain an unstretched fiber (IV) (monofilament).
I got When the breaking strength and breaking elongation of this unstretched fiber (IV) were measured, they were 2.5 g / d and 62%, respectively.
【００３２】次に、未延伸繊維（ＩＶ）を１２０℃で５
倍に延伸し、次いで１２５℃で定長で熱処理した。得ら
れたポリ乳酸繊維（Ｖ）の物性を測定したところ、繊度
６．９ｄ、破断強度８．６ｇ／ｄ、破断伸度３０％であ
った。Next, the unstretched fiber (IV) was heated at 120 ° C. for 5 hours.
The film was stretched twice and then heat-treated at a constant length at 125 ° C. When the physical properties of the obtained polylactic acid fiber (V) were measured, the fineness was 6.9 d, the breaking strength was 8.6 g / d, and the breaking elongation was 30%.
【００３３】（比較例１）重量平均分子量が６７８，０
００のポリＬ−乳酸を２４０℃で紡糸ドラフト８０で溶
融紡糸し、次に、これを１２０℃で５倍に延伸し、次い
で１２５℃で定長で熱処理した。得られたポリ乳酸繊維
の物性を測定したところ、繊度８．５ｄ、破断強度７．
２ｇ／ｄ、破断伸度３２％であり、破断強度の低いもの
であった。Comparative Example 1 The weight average molecular weight is 678,0.
00 poly L-lactic acid was melt spun at 240 ° C. in a spinning draft 80, then stretched 5 times at 120 ° C. and then heat-treated at 125 ° C. in a fixed length. When the physical properties of the obtained polylactic acid fiber were measured, the fineness was 8.5d and the breaking strength was 7.
The breaking strength was 2 g / d and the breaking elongation was 32%, and the breaking strength was low.
【００３４】（比較例２）実施例３で用いたポリＬ−乳
酸をクロロホルムに濃度２０重量％となるように溶解
し、保温筒（長さ５０ｃｍ）を用いて４０℃で乾式紡糸
を行った。得られた未延伸繊維を室温で充分乾燥した
後、１３０℃で１０倍に延伸して、次いで１３５℃で定
長熱処理を行った。得られた繊維（モノフイラメント）
の物性を測定したところ、繊度６．８ｄ、破断強度８．
３ｇ／ｄ、破断伸度２２％であり、破断伸度の低いもの
であった。(Comparative Example 2) The poly-L-lactic acid used in Example 3 was dissolved in chloroform to a concentration of 20% by weight, and dry spinning was carried out at 40 ° C using a heat insulating tube (length 50 cm). . The obtained unstretched fiber was sufficiently dried at room temperature, stretched 10 times at 130 ° C., and then subjected to a fixed length heat treatment at 135 ° C. Fiber obtained (monofilament)
The physical properties of were measured to have a fineness of 6.8 d and a breaking strength of 8.
The elongation at break was 3 g / d and the elongation at break was 22%, and the elongation at break was low.
【００３５】[0035]
【発明の効果】本発明によるポリ乳酸繊維は、破断強度
が８ｇ／ｄ以上及び破断伸度が３０％以上という優れた
強度と伸度を具備した繊維であり、加水分解性を有する
ことから、生体内や、自然環境中で分解されて悪影響が
ないという特徴を有する。このことから本発明のポリ乳
酸は釣り糸、ロ−プ、不織布、網等の形態に加工して、
特に使い捨ての用途に好ましく用いることができる。The polylactic acid fiber according to the present invention is a fiber having excellent strength and elongation with a breaking strength of 8 g / d or more and a breaking elongation of 30% or more, and since it has hydrolyzability, It is characterized by being decomposed in the living body and in the natural environment without adverse effects. From this, the polylactic acid of the present invention is processed into a form such as fishing line, rope, non-woven fabric, and net,
In particular, it can be preferably used for disposable applications.
Claims (4)
度が８ｇ／ｄ以上、破断伸度が３０％以上であることを
特徴とするポリ乳酸繊維。1. A fiber made of polylactic acid, which has a breaking strength of 8 g / d or more and a breaking elongation of 30% or more.
を含む、破断強度が８ｇ／ｄ以上、破断伸度が３０％以
上であるポリ乳酸繊維の製造方法。 （１）重量平均分子量が１０万〜５０万のポリ乳酸を溶
融紡糸し、未延伸繊維とする工程 （２）紡糸された未延伸繊維を延伸倍率４〜１０倍に熱
延伸する工程2. A method for producing a polylactic acid fiber having a breaking strength of 8 g / d or more and a breaking elongation of 30% or more, including at least the following steps (1) and (2). (1) A step of melt-spinning polylactic acid having a weight average molecular weight of 100,000 to 500,000 to obtain an unstretched fiber (2) A step of thermally stretching the spun unstretched fiber at a draw ratio of 4 to 10 times
〜２００であることを特徴とする請求項２記載の製造方
法。3. The draft in the melt spinning process is 50.
It is-200, The manufacturing method of Claim 2 characterized by the above-mentioned.
を特徴とする請求項２記載の製造方法。4. The manufacturing method according to claim 2, wherein the stretching temperature is 100 to 140 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7030930A JPH08226016A (en) | 1995-02-20 | 1995-02-20 | Polylactic acid fiber and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7030930A JPH08226016A (en) | 1995-02-20 | 1995-02-20 | Polylactic acid fiber and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08226016A true JPH08226016A (en) | 1996-09-03 |
Family
ID=12317406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7030930A Pending JPH08226016A (en) | 1995-02-20 | 1995-02-20 | Polylactic acid fiber and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08226016A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002008428A3 (en) * | 2000-07-21 | 2003-01-09 | Metabolix Inc | Production of polyhydroxyalkanoates from polyols |
| JP2003041433A (en) * | 2001-07-30 | 2003-02-13 | Toray Ind Inc | Polylactic acid fiber having excellent high-temperature mechanical characteristic |
| US6761970B2 (en) | 2001-07-30 | 2004-07-13 | Toray Industries, Inc. | Poly(lactic acid) fiber |
| US7994078B2 (en) | 2002-12-23 | 2011-08-09 | Kimberly-Clark Worldwide, Inc. | High strength nonwoven web from a biodegradable aliphatic polyester |
| JP2012149359A (en) * | 2011-01-19 | 2012-08-09 | Teijin Ltd | Method for producing stereo complex polylactic acid fiber having low dry heat shrinkage |
| CN108301067A (en) * | 2018-03-21 | 2018-07-20 | 浙江艾卡医学科技有限公司 | A kind of novel acid fiber by polylactic and preparation method thereof, application |
| CN115141365A (en) * | 2022-07-15 | 2022-10-04 | 吉祥三宝高科纺织有限公司 | Preparation of polylactic acid high-molecular dye and colored polylactic acid fiber |
| CN115948815A (en) * | 2022-11-18 | 2023-04-11 | 湖北博韬合纤有限公司 | Preparation method of PLA degradable short fibers |
-
1995
- 1995-02-20 JP JP7030930A patent/JPH08226016A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002008428A3 (en) * | 2000-07-21 | 2003-01-09 | Metabolix Inc | Production of polyhydroxyalkanoates from polyols |
| US8741624B2 (en) | 2000-07-21 | 2014-06-03 | Metabolix, Inc. | Production of polyhydroxyalkanoates from polyols |
| JP2003041433A (en) * | 2001-07-30 | 2003-02-13 | Toray Ind Inc | Polylactic acid fiber having excellent high-temperature mechanical characteristic |
| US6761970B2 (en) | 2001-07-30 | 2004-07-13 | Toray Industries, Inc. | Poly(lactic acid) fiber |
| US7994078B2 (en) | 2002-12-23 | 2011-08-09 | Kimberly-Clark Worldwide, Inc. | High strength nonwoven web from a biodegradable aliphatic polyester |
| JP2012149359A (en) * | 2011-01-19 | 2012-08-09 | Teijin Ltd | Method for producing stereo complex polylactic acid fiber having low dry heat shrinkage |
| CN108301067A (en) * | 2018-03-21 | 2018-07-20 | 浙江艾卡医学科技有限公司 | A kind of novel acid fiber by polylactic and preparation method thereof, application |
| CN115141365A (en) * | 2022-07-15 | 2022-10-04 | 吉祥三宝高科纺织有限公司 | Preparation of polylactic acid high-molecular dye and colored polylactic acid fiber |
| CN115141365B (en) * | 2022-07-15 | 2023-08-29 | 吉祥三宝高科纺织有限公司 | Preparation of polylactic acid polymer dye and colored polylactic acid fiber |
| CN115948815A (en) * | 2022-11-18 | 2023-04-11 | 湖北博韬合纤有限公司 | Preparation method of PLA degradable short fibers |
| CN115948815B (en) * | 2022-11-18 | 2023-07-21 | 湖北博韬合纤有限公司 | Preparation method of PLA degradable short fiber |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6420027B2 (en) | Biodegradable complex fiber and method for producing the same | |
| US4605730A (en) | Surgical articles of copolymers of glycolide and ε-caprolactone and methods of producing the same | |
| US4700704A (en) | Surgical articles of copolymers of glycolide and ε-caprolactone and methods of producing the same | |
| JP2603229B2 (en) | Method for producing crystalline copolymer of p-dioxanone and lactide | |
| EP0113739B1 (en) | Polyester containing filament material | |
| US5010145A (en) | Polylactic acid fiber | |
| US8287909B2 (en) | Medical devices containing melt-blown non-wovens of poly-4-hydroxybutyrate and copolymers thereof | |
| EP1205586B1 (en) | Multifilament yarns and methods of making | |
| US5110852A (en) | Filament material polylactide mixtures | |
| EP1057844B1 (en) | High Strength Fibres of l-Lactide Copolymers and Absorbable Medical Constructs Thereof | |
| US8808596B2 (en) | Process of making polyglycolic acid resin filament | |
| EP0999227B1 (en) | Copolyesters with minimized hydrolytic instability and crystalline absorbable copolymers thereof | |
| JPH04300557A (en) | Suture coated with copolymer coating composition | |
| JPH04212366A (en) | Crystalline copolyester of amorphous (lactide/glycolide) and rho-dioxanone | |
| GB2127839A (en) | Surgical articles | |
| JPH10120774A (en) | Triblock terpolymer, its production and use thereof for surgical suture material | |
| EP0745394B1 (en) | Surgical suture and method for preparation thereof | |
| JPH08226016A (en) | Polylactic acid fiber and its production | |
| JP3253222B2 (en) | Copolymer of p-dioxanone | |
| JPH09132638A (en) | Polymer capable of being absorbed by living tissue and its production | |
| JPH07216646A (en) | Polylactic acid porous yarn and its production | |
| NL8700229A (en) | POly L- or DL-lactide fibres of high tensile strength - useful for surgical sutures which are re-absorbed by the body | |
| PL220044B1 (en) | Method of producing fibers of micrometer size and increased strength properties of poly(lactic acid) and copolymers thereof from the solution by wet |